Does your bitconnect-qt wallet need to be running 24/7 in order to get your maximum stake? OP doesnt specify
just need to put the bcc in your wallet, and wait at least 15 days before it starts staking.
You also need to leave your wallet open and running to stake, yes. You need to unlock the wallet "for staking only" and just leave it running. Doesn't use much resources at all.
Are you sure that you need to leave a wallet open?
I lost almost 2 weeks then

At website it says "All you have to do to earn with this method is to hold coins in your Bitconnect-QT wallet.", which is not exactly "running the wallet".
@bitconnectcoin please update the info at your website if it's true - some people may misunderstand.
No it is not necessary to turn on your system but you have take backup of your BitConnect Coin Wallet.
because if your wallet will loss then you will loss your bitconnect coin.if you have backup then you can restore your coin.
You require to hold your BitConnect Coin minimum for 15 days to start earning
Staking interest. You will see PoS minting Block in your wallet anytime after 15 days,
the number of block you earn are based upon the number of coins you hold in wallet.
For staking refer this page :
https://bitconnectcoin.co/guide/8/How-To-Stake-BitConnect-Coin-and-Earn-Interest-on-your-BitConnect-Coin-holding To take backup refer this page :
https://bitconnectcoin.co/guide/6/How-to-take-backup-and-restore-of-your-BitConnect-Coin-Wallet